See:

https://mail.gnome.org/archives/xml/2012-October/msg00038.html
https://mail.gnome.org/archives/xml/2012-October/msg00039.html

--- libxml2-2.9.2/configure.ac	2014-10-15 21:06:15.000000000 -0700
+++ libxml2-2.9.2/configure.ac	2014-10-30 06:08:49.500465105 -0700
@@ -83,6 +83,7 @@
 else
   case $host in
   *-*-sunos*) VERSION_SCRIPT_FLAGS="-Wl,-M -Wl,";;
+  *-*-solaris*) VERSION_SCRIPT_FLAGS="-Wl,-M -Wl,";;
   esac
 fi
 AC_SUBST(VERSION_SCRIPT_FLAGS)
@@ -1226,7 +1227,7 @@
     TEST_SAX=SAXtests
 fi
 AC_SUBST(WITH_SAX1)
-AM_CONDITIONAL(WITH_SAX1_SOURCES, test "${WITH_TRIO}" = "1")
+AM_CONDITIONAL(WITH_SAX1_SOURCES, test "${WITH_SAX1}" = "1")
 AC_SUBST(TEST_SAX)
 
 if test "$with_push" = "no" ; then